Quantum mode control for piezoelectric transformers in AC/DC applications

Nuño, F.; Martin, J.A.; Díaz, J.; Prieto, Miguel J.; Fernandez-Linera, F.M.

doi:10.1109/ciep.2002.1216660

Cited by 5 publications

(7 citation statements)

References 6 publications

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“…The PT design was based on a ring-shaped element operating in thickness vibrational mode, where the primary and secondary sections are separated by an isolation layer [90][91][92][93][94][95][96][97][98][99][100].…”

Section: Beyond the 2000s: Power Piezoelectric Transformersmentioning

confidence: 99%

Piezoelectric Transformers: An Historical Review

Carazo¹

2016

Actuators

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Piezoelectric transformers (PTs) are solid-state devices that transform electrical energy into electrical energy by means of a mechanical vibration. These devices are manufactured using piezoelectric materials that are driven at resonance. With appropriate design and circuitry, it is possible to step up and step down the voltages between the input and output sections of the piezoelectric transformer, without making use of magnetic materials and obtaining excellent conversion efficiencies. The initial concept of a piezoelectric ceramic transformer was proposed by Charles A. Rosen in 1954. Since then, the evolution of piezoelectric transformers through history has been linked to the relevant work of some excellent researchers as well as to the evolution in materials, manufacturing processes, and driving circuit techniques. This paper summarizes the historical evolution of the technology.Keywords: piezoelectric transformer; piezoelectric-based power supply; non-magnetic transformers Historical Introduction 1920s-1930s: Early Studies on Piezoelectric Transformers Using Salt Rochelle Single CrystalThe first studies on electrical to electrical conversion using piezoelectric materials took place in the late 1920s and early 1930s. Alexander McLean Nicolson has the honor of being the first researcher to investigate the idea of a piezoelectric transformer. Nicolson considered two single crystal blocks preloaded against each other with an external frame (Figure 1). Abstract: Piezoelectric transformers (PTs) are solid-state devices that transform electrical energy into electrical energy by means of a mechanical vibration. These devices are manufactured using piezoelectric materials that are driven at resonance. With appropriate design and circuitry, it is possible to step up and step down the voltages between the input and output sections of the piezoelectric transformer, without making use of magnetic materials and obtaining excellent conversion efficiencies. The initial concept of a piezoelectric ceramic transformer was proposed by Charles A. Rosen in 1954. Since then, the evolution of piezoelectric transformers through history has been linked to the relevant work of some excellent researchers as well as to the evolution in materials, manufacturing processes, and driving circuit techniques. This paper summarizes the historical evolution of the technology.

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Section: Beyond the 2000s: Power Piezoelectric Transformersmentioning

confidence: 99%

Piezoelectric Transformers: An Historical Review

Carazo¹

2016

Actuators

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“…The PT also acts as a key component of a highfrequency DC-to-AC resonant inverter used to convert a low DC voltage (typically DC 12 V) to a high AC voltage (typically 1500 V rms ) for ionizing a Neon lamp, or a high AC voltage (typically 860 V rms ) for lighting the Neon lamp [7]. In studying the responses of the OFF transient state, a double-closed loop DC-to-DC converter was shutdown after the output voltage of a PT in the chopper increased over the upper limit [8]- [12]. This converter was restarted by a positive pulse current after the output voltage decreased below the lower limit.…”

Section: Introductionmentioning

confidence: 99%

Effects of a parallel resistor on electrical characteristics of a piezoelectric transformer in open-circuit transient state

Chang

2007

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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This paper investigates electrical transient characteristics of a Rosen-type piezoelectric transformer (PT), including maximum voltages, time constants, energy losses and average powers, and their improvements immediately after turning OFF. A parallel resistor connected to both input terminals of the PT is needed to improve the transient characteristics. An equivalent circuit for the PT is first given. Then, an open-circuit voltage, involving a direct current (DC) component and an alternating current (AC) component, and its related energy losses are derived from the equivalent circuit with initial conditions. Moreover, an AC power control system, including a DC-to-AC resonant inverter, a control switch and electronic instruments, is constructed to determine the electrical characteristics of the OFF transient state. Furthermore, the effects of the parallel resistor on the transient characteristics at different parallel resistances are measured. The advantages of adding the parallel resistor also are discussed. From the measured results, the DC time constant is greatly decreased from 9 to 0.04 ms by a 10 kΩ parallel resistance under open output.

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“…Currently, there are few studies on the charging power of the PZT [4], and a frequency analysis of the quantum control is not directly available in such fields. Although the quantum control mode [5] can facilitate the improvement of the system reliability, some constraints cannot be eliminated because of the driving frequency determination. In this paper, it is realized by both zero-voltage switching (ZVS) and CCC to optimize the choice of the drive frequency.…”

Section: Introductionmentioning

confidence: 99%

Design of a High-Voltage Piezoelectric Converter for Airbag Ignition Modules

Xiao¹,

Du²,

Bai³

et al. 2014

Journal of Power Electronics

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Due to the requirements for high reliability and accuracy, safety issues for airbag ignition systems need to be studied. In this paper, a high-voltage piezoelectric converter is designed to improve these requirements in airbag ignition systems. The proposed converter includes an inverter drive circuit, a Rosen piezoelectric transformer (PZT), an output circuit and a feedback control circuit. The key components of the high-voltage piezoelectric transformer are analyzed in detail. In addition, the proposed converter system is simulated and implemented for testing. The experimental results show that when the power supply is turned on, the charging time is less than 800ms. Furthermore, the output voltage of this converter can be kept between 2.9kV and 3.1kV, under high-efficiency constant current charging mode and zero-voltage switching conditions.

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Quantum mode control for piezoelectric transformers in AC/DC applications

Cited by 5 publications

References 6 publications

Piezoelectric Transformers: An Historical Review

Piezoelectric Transformers: An Historical Review

Effects of a parallel resistor on electrical characteristics of a piezoelectric transformer in open-circuit transient state

Design of a High-Voltage Piezoelectric Converter for Airbag Ignition Modules

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